Hi Gironde and Croc. As you told, the compared dimensions between N-1 launch Pad and Proton-M rocket are wrong, so I tried a simple solution, i.e. I modified the Proton-M radius, and at the same time I increased the height above ground, to compensate for increased size.This was simple, just two lines to change in Proton M-Pad.ssc file:

But, alas, We have another problem: the Proton-M model has wrong dimensions, i.e. it's too "slim".If you take a look at the second image,

Proton-M model wrong dimensions

you find in #1 the image of the real machine, in #2 the model with same height, and in image #3 the comparison, with the stage A equal length/diameter.As you see the problem is in the second stage, about 30% longer than the real one.

And moreover, as shown in image #3,

Transparent junction between stage 2 and 3

the junction between second and third stage is transparent, with a look to the inside (why red? ).Sorry for this, but the model is not real, IMHO, so I suggest not to include it in Celestia next release.My opinion, obviously.Bye.

The Time History of Events and Macroscale Interactions during Substorms (THEMIS) mission began in February 2007 as a constellation of five NASA satellites (THEMIS A through THEMIS E) to study energy releases from Earth's magnetosphere known as substorms, magnetic phenomena that intensify auroras near Earth's poles. The name of the mission is an acronym alluding to the Titan, Themis.

Three of the satellites orbit the Earth within the magnetosphere, while two have been moved into orbit around the Moon. Those two were renamed ARTEMIS for Acceleration, Reconnection, Turbulence and Electrodynamics of the Moon’s Interaction with the Sun. THEMIS B became ARTEMIS P1 and THEMIS C became ARTEMIS P2.https://en.wikipedia.org/wiki/THEMIS

Hello Gironde... NOAA models have defect... please, let's do not use models with defects for Celestia... I worked with this model, but becoz I still have no solution about how to made this model better, I did not posted it here... thanks very much for work, but let's make models more realistic...

Regarding transparency, I corrected the problem.Why this transparency existed:most of the models we find on the web have been made by model enthusiasts and intended to be printed in 3D to make models, sometimes very impressive realism. I found on a site a model of this type for Saturn V which was no less than 500Mo, all floors were removable to see the interior with the LEM for example. It is for this reason that under the outer panels, there are interior elements also modeled (for Proton, in red).

Added after 9 minutes 11 seconds:Toutatis,

I know that some models are not at the top. We are not experienced modelers but that is why we do not need these models.

You've changed some of the old add-on that we've been happy with for years. The coming years will allow us to have new models more real given the proliferation of 3D models of all kinds with the advent of 3D printers.

on the bottom of the satellite, there are two blue panels and nonexistent panels that leave the satellite open at this location but the inside of the bottom is not vectorized and leaves an inadequate transparency. So I preferred to put gray semi-transparent panels that erase a little this unpleasant effect.

Hi gironde.You are right about the Proton-M model, the one you imported and modified for Celestia in one of the (numerous) versions built during the Proton long history.To be sure of this I asked in Russian for "Proton-M versions" (a good way to solve doubts is to search in original language local pages ), and I found this:

If you input the link in Google Translator you obtain a comprehensive page that gives the needed answers. So thank you for the transparency correction, now it's perfect and moreover one of the best detailed space models in Celestia, very appreciated: